Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a04f4af1974c80261e8a0b87b264066e3bbcdfc87eec6431bcf213cfda2c830c' 
  AND token = 'deRq4L9dGkbrD+oSUE3VjFDhbUH6WOkrrBjF+t++twk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}